Afterwards, developers may see new notices about deprecations, whether from their own app or addons they are using.

Upgrading minor versions (like 3.4 to 3.5) will give access to new features, but the codebase will not need to change, so these are also usually very quick.

These upgrades are usually very quick and require no changes besides changing some dependency versions in package.json. They are mostly bugfixes and internal refactors.

Moving from patch versions (like 3.4.1 to 3.4.2) will not change the app's behavior.

Ember follows SemVer rules closely, meaning that: Upgrade experience depends on whether the app should have a major, minor, or patch version upgrade. Ember provides tools that walk you through the process. There's more to upgrading an Ember app than changing the version number in package.json. In general, here's how to upgrade the version of the CLI and verify that the upgrade worked: npm uninstall -g ember-cli Upgrade instructions are published with each release. New versions of the CLI are released roughly every 6 weeks, in step with versions of Ember.js itself. The Ember CLI is backwards-compatible, meaning that the latest CLI can be used with older app versions.

The version of the CLI that you are using.

There are three kinds of upgrades for normal Ember app development:

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